s3c72m9 Samsung Semiconductor, Inc., s3c72m9 Datasheet - Page 309
s3c72m9
Manufacturer Part Number
s3c72m9
Description
The S3c72m5/s3c72m7/s3c72m9 Single-chip Cmos Microcontroller Has Been Designed For High Performance Using Samsung S
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.S3C72M9.pdf
(382 pages)
- Current page: 309 of 382
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S3C72M5/C72M7/C72M9/P72M9 (Preliminary Spec)
12
OVERVIEW
The S3C72M5/C72M7/C72M9 microcontroller can directly drive an up-to-1280-dot (80 segments x 16 commons)
LCD panel. Its LCD block has the following components:
— LCD controller/driver
— Display RAM for storing display data
— 80 segment output pins (SEG0–SEG79)
— 16 common output pins (COM0–COM15)
— Five LCD operating power supply pins (V
— V
— LCD contrast control circuit by software (16 steps)
— Segment expandable function
The frame frequency, and the segment pins used for display output, are determined by bit settings in the LCD mode
register, LMOD.
The LCD control register, LCON, is used to turn the LCD display on and off, to switch current to the dividing resistors
for the LCD display, to select duty and to output LCD seg expand signal for LCD SEG expansion. The LCD contrast
control register, LCNST, is used to control LCD bias voltage by 16 steps. Data written to the LCD display RAM can
be transferred to the segment signal pins automatically without program control.
When a subsystem clock is selected as the LCD clock source, the LCD display is enabled even during main clock
stop and idle modes.
LC1
pin for controlling the driver and bias voltage
LCD CONTROLLER/DRIVER
8
Figure 12-1. LCD Function Diagram
LC1
Controller/
–V
Driver
LCD
LC5
)
48
32
5
8
8
V
COM0-COM7
COM8-COM15/
SEG87-SEG80
SEG0-SEG47
SEG48-SEG79/
P13.0-P6.0
LC1
-V
LC5
LCD CONTROLLER/DRIVER
12-1
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